The GENERAL SETTINGS tab is located under the Profile section.
1. Navigate to the Profile section on the left side menu.
2. Select the GENERAL SETTINGS tab if its not already selected.
3. Click the CHANGE USERNAME button located at the bottom of the screen.
4. Your old username will be shown, enter a new username, if the new username is already taken you will see a message saying the username is already taken you will need to try again.
5. Once you have selected a new username Click SAVE
6. You will be prompted to confirm the new username, click OK.